Hi there,
i am currently trying to get rid of bugs in my Hadoop program by
debugging it. Everything went fine til some point yesterday. I dont know
what exactly happened, but my program does not stop at breakpoints
within the Reducer and also not within the RawComparator for the values
which i do use for sorting my inputs in the ReducerIterator.
(see the classes set for the conf below:)
conf.setOutputValueGroupingComparator(TwitterValueGroupingComparator.class);
conf.setReducerClass(RetweetReducer.class);
The log looks like this:
Warning: $HADOOP_HOME is deprecated.
Listening for transport dt_socket at address: 5002
12/05/21 19:24:20 INFO util.NativeCodeLoader: Loaded the native-hadoop
library
12/05/21 19:24:20 WARN mapred.JobClient: Use GenericOptionsParser for
parsing the arguments. Applications should implement Tool for the same.
12/05/21 19:24:20 WARN snappy.LoadSnappy: Snappy native library not loaded
12/05/21 19:24:20 INFO mapred.FileInputFormat: Total input paths to
process : 2
12/05/21 19:24:20 WARN conf.Configuration:
file:/tmp/hadoop-ema/mapred/local/localRunner/job_local_0001.xml:a
attempt to override final parameter: fs.default.name;Ignoring.
12/05/21 19:24:20 WARN conf.Configuration:
file:/tmp/hadoop-ema/mapred/local/localRunner/job_local_0001.xml:a
attempt to override final parameter: mapred.job.tracker;Ignoring.
12/05/21 19:24:20 INFO mapred.JobClient: Running job: job_local_0001
12/05/21 19:24:20 INFO util.ProcessTree: setsid exited with exit code 0
12/05/21 19:24:21 INFO mapred.Task:Using ResourceCalculatorPlugin :
org.apache.hadoop.util.LinuxResourceCalculatorPlugin@1c4ff2c
12/05/21 19:24:21 INFO mapred.MapTask: numReduceTasks: 1
12/05/21 19:24:21 INFO mapred.MapTask: io.sort.mb = 100
12/05/21 19:24:22 INFO mapred.JobClient:map 0% reduce 0%
12/05/21 19:24:22 INFO mapred.MapTask: data buffer = 79691776/99614720
12/05/21 19:24:22 INFO mapred.MapTask: record buffer = 262144/327680
12/05/21 19:24:22 INFO mapred.MapTask: Starting flush of map output
12/05/21 19:24:22 INFO mapred.MapTask: Finished spill 0
12/05/21 19:24:22 INFO mapred.Task: Task:attempt_local_0001_m_000000_0
is done. And is in the process of commiting
12/05/21 19:24:23 INFO mapred.LocalJobRunner:
file:/home/ema/INPUT-H/tweets_ext:0+968
12/05/21 19:24:23 INFO mapred.Task: Task 'attempt_local_0001_m_000000_0'
done.
12/05/21 19:24:23 INFO mapred.Task:Using ResourceCalculatorPlugin :
org.apache.hadoop.util.LinuxResourceCalculatorPlugin@1e8c585
12/05/21 19:24:23 INFO mapred.MapTask: numReduceTasks: 1
12/05/21 19:24:23 INFO mapred.MapTask: io.sort.mb = 100
12/05/21 19:24:24 INFO mapred.MapTask: data buffer = 79691776/99614720
12/05/21 19:24:24 INFO mapred.MapTask: record buffer = 262144/327680
12/05/21 19:24:24 INFO mapred.MapTask: Starting flush of map output
12/05/21 19:24:24 INFO mapred.Task: Task:attempt_local_0001_m_000001_0
is done. And is in the process of commiting
12/05/21 19:24:24 INFO mapred.JobClient:map 100% reduce 0%
12/05/21 19:24:26 INFO mapred.LocalJobRunner:
file:/home/ema/INPUT-H/tweets~:0+0
12/05/21 19:24:26 INFO mapred.Task: Task 'attempt_local_0001_m_000001_0'
done.
12/05/21 19:24:26 INFO mapred.Task:Using ResourceCalculatorPlugin :
org.apache.hadoop.util.LinuxResourceCalculatorPlugin@191e4c
12/05/21 19:24:26 INFO mapred.ReduceTask: ShuffleRamManager:
MemoryLimit=709551680, MaxSingleShuffleLimit=177387920
12/05/21 19:24:27 INFO mapred.ReduceTask: attempt_local_0001_r_000000_0
Need another 2 map output(s) where 0 is already in progress
12/05/21 19:24:27 INFO mapred.ReduceTask: attempt_local_0001_r_000000_0
Thread started: Thread for merging on-disk files
12/05/21 19:24:27 INFO mapred.ReduceTask: attempt_local_0001_r_000000_0
Thread waiting: Thread for merging on-disk files
12/05/21 19:24:27 INFO mapred.ReduceTask: attempt_local_0001_r_000000_0
Scheduled 0 outputs (0 slow hosts and0 dup hosts)
12/05/21 19:24:27 INFO mapred.ReduceTask: attempt_local_0001_r_000000_0
Thread started: Thread for merging in memory files
12/05/21 19:24:27 INFO mapred.ReduceTask: attempt_local_0001_r_000000_0
Thread started: Thread for polling Map Completion Events
12/05/21 19:24:32 INFO mapred.LocalJobRunner: reduce > copy >
12/05/21 19:24:35 INFO mapred.LocalJobRunner: reduce > copy >
12/05/21 19:24:42 INFO mapred.LocalJobRunner: reduce > copy >
12/05/21 19:24:48 INFO mapred.LocalJobRunner: reduce > copy >
12/05/21 19:24:51 INFO mapred.LocalJobRunner: reduce > copy >
12/05/21 19:24:57 INFO mapred.LocalJobRunner: reduce > copy >
... etc ...
Is there something i have missed?
Thanks for your help in advance!
Best regards,
Björn-Elmar
